... woven bag lined with high-pressure polythene plastic bagUsage:It is used as chemical reagent, glass etchant. Aseptic and disinfector, ... screening agent, flux ofmetallurgy in fermenting industry. It is also used for pottery and magnesium alloy. Specification: ItemSpecificationSuperior Grade1st ... 20.2Sulfate(base on SO4) content,%≤0.10.1Content of ammonium fluosilicate [(NH4)SiF6] ,%≤2.04.0 ...